Home
Class 12
PHYSICS
What is the shape of wavefront from dist...

What is the shape of wavefront from distant source of light?

A

Planar

B

Spherical

C

cylindrical

D

Depends on shape of the source

Text Solution

Verified by Experts

The correct Answer is:
A
From a large distance, source of any shape can be approximated as point source which emits spherical wavefronts around it. But for points at infinite sepration, these spherical wavefronts become almost planar.
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICAL

    MODERN PUBLICATION|Exercise OBJECTIVE TYPE QUESTIONS (B. MULTIPLE CHOICE QUESTIONS) -AIPMT/NEET & OTHER STATE BOARDS FOR MEDICAL ENTRANCE|10 Videos

  • WAVE OPTICAL

    MODERN PUBLICATION|Exercise OBJECTIVE TYPE QUESTIONS (JEE (MAIN) & OTHER STATE BOARDS FOR ENGINEERING ENTRANCE)|22 Videos

  • WAVE OPTICAL

    MODERN PUBLICATION|Exercise Revision Exercises (Numerical Problems)|31 Videos

  • SEMICONDUCTOR ELECTRONICS METERIALS DEVICES AND SIMPLE CIRCUITS

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST FOR BOARD EXAMINATION|12 Videos

Similar Questions

Explore conceptually related problems

What is a point source of light?

The wavefront of a linear source of light is

What is the shape of wavefront for the light diverging from a point source ?

What is the shape of the wavefront in each of the following cases ? (a) light diverging from point source. (b) light emerging out of a convex lens when a point source is placed at its focus. ( c) the portion of the wavefront of light from a distant star intercepted by earth.

What is the geomatrical shape of wavefront emitted from a source in the form of narrow slit ?

Huygen was the figure scientist who proposed the idea of wave theory of light he said that the light propagates in form of wavelengths. A wavefront is a imaginary surface of every point of which waves are in the same. phase. For example the wavefront for a point source of light is collection of concentric spheres which have centre at the origin w_(1) is a wavefront w_(2) is another wavefront. The radius of the wavefront at time 't' is 'ct' in thic case where 'c' is the speed of light the direction of propagation of light is perpendicular to the surface of the wavelength. the wavefronts are plane wavefronts in case of a parallel beam of light. Huygen also said that every point of the wavefront acts as the source of secondary wavelets. The tangent drawn to all secondary wavelets at a time is the new wavefront at that time. The wavelets are to be considered only in the forward direction (i.e., the direction of propagation of light) and not in the reverse direction if a wavefront w_(1) and draw spheres of radius 'cDeltat' they are called secondary wavelets. Draw a surface w_(2) which is tangential to all these secondary wavelets w_(2) is the wavefront at time t+Deltat Huygen proved the laws of reflection and laws of refraction using concept of wavefront. Q. A point source of light is placed at origin, in air. the equation of wavefront of the wave at time t, emitted by source at t=0 is (take refractive index of air as 1)

Huygen was the figure scientist who proposed the idea of wave theory of light he said that the light propagates in form of wavelengths. A wavefront is a imaginary surface of every point of which waves are in the same. phase. For example the wavefront for a point source of light is collection of concentric spheres which have centre at the origin w_(1) is a wavefront w_(2) is another wavefront. The radius of the wavefront at time 't' is 'ct' in thic case where 'c' is the speed of light the direction of propagation of light is perpendicular to the surface of the wavelength. the wavefronts are plane wavefronts in case of a parallel beam of light. Huygen also said that every point of the wavefront acts as the source of secondary wavelets. The tangent drawn to all secondary wavelets at a time is the new wavefront at that time. The wavelets are to be considered only in the forward direction (i.e., the direction of propagation of light) and not in the reverse direction if a wavefront w_(1) and draw spheres of radius 'cDeltat' they are called secondary wavelets. Draw a surface w_(2) which is tangential to all these secondary wavelets w_(2) is the wavefront at time t+Deltat Huygen proved the laws of reflection and laws of refraction using concept of wavefront. Q. Spherical wavefronts shown in figure, strike a plane mirror. reflected wavefront will be as shown in

MODERN PUBLICATION-WAVE OPTICAL-OBJECTIVE TYPE QUESTIONS (A. MULTIPLE CHOICE QUESTIONS)
  1. In Young's double-slit experiment, coordinate system is selected in su...

    Text Solution

    |

  2. In a standard Young's double-slit experiment set-up, two point P and Q...

    Text Solution

    |

  3. A source emitting light of wavelengths lambda1 and lambda2 is used in ...

    Text Solution

    |

  4. Select best monochromatic source of light.

    Text Solution

    |

  5. In Young's double-slit experiment , d is separation between the slits....

    Text Solution

    |

  6. When light is refracted which of the following does not change?

    Text Solution

    |

  7. Two sources are called coherent if they produce waves

    Text Solution

    |

  8. In standard Young's double-slit experiment, 9 fringes are found to be ...

    Text Solution

    |

  9. Two light waves having the same wavelength lambda in vacuum are in pha...

    Text Solution

    |

  10. When exposed to sunlight, thin films of oil on water often exhibit bri...

    Text Solution

    |

  11. If entire Young's double-slit experiment set-up is immersed in water, ...

    Text Solution

    |

  12. There is an equilateral triangle ABC. Two monochromatic and coherent s...

    Text Solution

    |

  13. What is the shape of wavefront from distant source of light?

    Text Solution

    |

  14. What is the phase difference between any two points on a wave front ?

    Text Solution

    |

  15. In YDSE, when a glass plate of refractive index 1.5 and thickness t is...

    Text Solution

    |

  16. It is observed that amplitude modulated (AM) radio wave shows apprecia...

    Text Solution

    |

  17. A thin transparent sheet is placed in front of a slit in Young's doubl...

    Text Solution

    |

  18. In Young's double-slit experiment, two cohernet sources of different i...

    Text Solution

    |

  19. There is a source emitting electromagnetic waves of wavelength 2m . On...

    Text Solution

    |

  20. Two identical coherent sources are used to perform interference experi...

    Text Solution

    |